.travis.yml: fail build when one of commands fails.

Correction for 2f5a49a commit.

Author: php-coder

.travis.yml

@@ -1,12 +1,12 @@
 language: java
 script:
-  - mvn --batch-mode checkstyle:check -Dcheckstyle.violationSeverity=warning | egrep -v '^\[INFO\] Download(ing|ed):'
-  - mvn --batch-mode pmd:check | egrep -v '^\[INFO\] Download(ing|ed):'
-  - mvn --batch-mode license:check | egrep -v '^\[INFO\] Download(ing|ed):'
-  - mvn --batch-mode verify | egrep -v '^\[INFO\] Download(ing|ed):'
-  - mvn --batch-mode jasmine:test | egrep -v '^\[INFO\] Download(ing|ed):'
+  - mvn --batch-mode checkstyle:check -Dcheckstyle.violationSeverity=warning | egrep -v '^\[INFO\] Download(ing|ed):' | tee cs.log; fgrep -qs '[ERROR]' cs.log && false || true
+  - mvn --batch-mode pmd:check | egrep -v '^\[INFO\] Download(ing|ed):' | tee pmd.log; fgrep -qs '[ERROR]' pmd.log && false || true
+  - mvn --batch-mode license:check | egrep -v '^\[INFO\] Download(ing|ed):' | tee licence.log; fgrep -qs '[ERROR]' licence.log && false || true
+  - mvn --batch-mode verify | egrep -v '^\[INFO\] Download(ing|ed):' | tee verify.log; fgrep -qs '[ERROR]' verify.log && false || true
+  - mvn --batch-mode jasmine:test | egrep -v '^\[INFO\] Download(ing|ed):' | tee jasmine.log; fgrep -qs '[ERROR]' jasmine.log && false || true
 after_success:
-  - mvn --batch-mode jacoco:prepare-agent test jacoco:report coveralls:jacoco | egrep -v '^\[INFO\] Download(ing|ed):'
+  - mvn --batch-mode jacoco:prepare-agent test jacoco:report coveralls:jacoco | egrep -v '^\[INFO\] Download(ing|ed):' | tee jacoco.log; fgrep -qs '[ERROR]' jacoco.log && false || true
 
 jdk:
   - oraclejdk8